属性Dates未定义是什么意思啊

Question

success: function (data) {
$.each(JSON.parse(data), function (index, o) {
var s = "";
s += "

";
s += "";
s += "" + o.AttendanceInfo.Dates + "";
s += "" + o.AttendanceInfo.LastTime + "";
s += "" + o.AttendanceInfo.FristTime + "";
s += "";
s += "";
$("#AttendanceTime tr:gt(0)").remove();

Answer 1

没有这个属性值,或者有这个属性值,但是为空值,没有赋值